How does Microsoft prevent/bill Azure MFA failed authentications in a per-authentication model?

New Contributor

Good day community,


A customer considers Azure MFA in a per-authentication model, because they have far more external users than internal employees.


Microsoft counts and bills both succesful as failed (denied) authentications, so the customer wonders:


What happens if somehow (a hacker/robot) generates tons of failed authentications? Will Microsoft bill the customer accordingly or are there other mechanisms in place to prevent this?


Thank you,

Cheers Mike

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